What is timeout during data extraction?

< 1 min read

Timeout during data extraction means the source query took longer than allowed execution time.
Power BI cancels the request and refresh fails before completion.
In our project, a large join query ran over 2 hours and gateway timed out.
This usually happens with huge tables, no indexes, or broken query folding.
Network latency between gateway and database can also trigger timeout.
API sources timeout when response size is too large or slow.
We solved it by filtering last 1 year data at source and creating SQL views.
Also scheduled refresh was moved to off-peak hours.
Incremental refresh reduced extraction volume significantly.
So timeout indicates performance issue either in query or connectivity.

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